Device for cutting pack-thread



Dec. 29, 1931. c, GERBER 1,838,542

DEVICE FOR CUTTING PACK THREAD Filed June 22, 1928 1 HU'EZDZ'OIL C. Gerber,

Patented Dec. 29,1931

" UirosTATEs CHRISTIAN GERBER, or BERN, SWITZERLAND DEVICE non CUTTING BACK-THREAD Application filed June 22, 1928, Serial No. 287,565, and in switzerland J'unex23, 1927.

For cutting twine, string, cord, tape and like tying means in shops, stores and the like,

either scissors are used or a cutter placed on the counter. Such cutters on a counter or table are generally cumbrous and frequently are in the way of a salesman packing up goods that have been sold. I i

The subject-matter of the present invention is a device for cutting twine, string, cord, tape and like tying means, which is to be mounted on a counter, table, desk or the like at its edge and enables the string or the like to be out conveniently. As compared with known cutting devices referred to above, the device according to the invention when ar ranged at the edge of the counter has the advantage that it never constitutes an obstruction or obstacle, but is always ready for use at a predetermined convenient unobtrusive place without its entailing any risk of injury to anyone.

According to one feature ofthe invention there is provided a part having at least one blade to be arranged on a counter or the like at its edge, over the cutting edge of which blade string or the like to be out can be passed.

According to another feature of the invention, the middle part of a leaf spring is placed on a longitudinal base which is to be mounted on or near an edge of a counter or the like, in which base is inserted a blade with its cutting edge projecting above the same, which blade is covered by the said leaf spring.

Other features of the invention will be described with reference to the accompanying 'drawings wherein one embodiment is diagrammatically illustrated by Way of example. In said drawings 2- i 1 Figure lis a plan view, partly in horizontal section on the line 1-1' in Figure 2 showing a cutting device according to the invention, and I I Figure 2 is a side elevation thereof, partly in longitudinal section; v

Figures 8 and iars cross-sections taken respectively on the lines IIIIII and IV- IV in Figure 2, and V i r 5 Figure 5 shows the blade in side elevation."

wards.

' Figure 6 is a longitudinal sectional detail of the base Like reference characters designate like parts throughout the several views), 7

support or base 1, rectangular in plan view, has twoscrew holes 2, one at each end, for fastening it to a counter or the like at its edge. In the middle of its length the base has an elevated portion 3. A grooved, open above andclosed, below, extends longitudinally of ()0 the base fromonehole 2 to the other, and

receives a blade 5 whereofthe cutting edge projects above thebase, which blade gradual: ly decreases in depth towardsits ends fromthe middle. The blade has towards one enda hole 6 6 serving for removing it out of the groove by means of. a pin' which can be placed through the hole. In order toprevent injurj by the blade,,the latter is covered along its entire length by-a guard member-in the form 7 of a leaf spring '7 which has its end portions bent back downwards and inwards to form lower limbs, whereof the inner ends are bent upwardsthereby forming loops'and .out-

The inner ends bear against the .5 curved ends 3 of the elevated portion and prevent the" leaf spring from shifting when mounted on the base. The leaf spring 7 has alongitudinal slot 8 in its end portions on the base, extends upwards. i The leaf spring 7 is detachably attached to the base in the middle by means of a cover spring 9 which forms a kind of cap and which n has at both sides of the elevation 3 downwardly extending lugs 10 ,at their lower ends these lugs are formed as inwardly directed hooks ll engaging in recesses or grooves 12, one. at eachsideof the elevation 3. These grooves 12 are deepest in themiddle and the f hooks 11 are shaped correspondingly so that the cap lspr-ing l9, whichconstitutes a rein forcement for the leaf .spingg'f, cann'otlbe waythe springs? and 9 areseeuredin position without other fastening means, such as rivets,"screws and the like. 7 I v p ,In' order'that theistring, cord, tape, thread or liketying inean'swhic'h is to be cut through which. slots the blade 5 hifted in the'direction of its length. In this passing it between the leaf spring 7 and the base 1 shall not be jammed or clamped between these two parts, whereby the cutting operation would be rendered more difficult, the base is rounded at its upper side at both sides of the elevation 3 for a distance approximately equal to the length of said limbs of the leaf spring (Figure 3) At its two ends the base has bevelled faces 13, over which the curved ends of the leaf spring 7 project, thereby considerably facilitating the insertion of the string or the like between the base and the leaf spring. Also, owing to the ends of the base being bevelled projecting edges are avoided at which persons may injure themselves, or clothes may be damaged.

Instead of only one blade two shorter blades may be accommodated in the longitudinal groove in the base.

What I claim is:

1. A cutting device for twine and like tying means, comprising a longitudinal base having a groove in the direction of its length and having an elevated portion between its ends, a blade accommodated in said groove with its cutting edge lying above the base and tapering towards both ends, a leaf spring carried by said elevated portion and covering the blade along its entire length, the end portions of said spring being bent towards the base and directed towards one another, and extended to said elevated portion, and each of the end portions of the spring having a slot for the passage of the blade.

2. A cutting device as set forth in claim 1, wherein the elevated portion of the base is provided on opposite sides with recesses and wherein a cap is slipped over the middle portion of the leaf spring and engages in the {Oecesses of the said elevated portion of the ase.

3. A cutting device as set forth in claim 1, wherein a cap of U shape is slipped over the middle portion of the leaf spring and has the free ends of its limbs bent towards one another to form hooks which detachably engage with opposite sides of the said elevated portion of the base.

4. A cutting device for twine and like tying means comprising a relatively flat base having an elevated portion medially of its ends and provided with a longitudinal groove in its upper surface, a blade accommodated in the groove with its upper cutting edge lying slightly above the base and tapering from the center towards the respective ends, the opposite ends of the elevated portion of the base being curved inwardly, a guard member in the form of a leaf spring, the upper medial portion of which rests on the upper surface of the elevated portion and terminates in substantially elongated loops the inner ends of which bear against the curved ends of the elevated portions on the base to prevent shifting movement of the leaf spring, and the lower portions of the loops of said spring being each provided with a slot for the passage of the blade.

In testimony whereof I afiix my signature.

CHRISTIAN GERBER. 

